Recent fluvial processes and navigation-obstructing characteristics in different reaches of the Yangtze Estuary

Based on the site survey and years of field measurement data,the fluvial processes in the recent ten years and its variation trend in the different reaches of the Yangtze Estuary were analyzed and summarized.With the waterway development planning,navigation-obstructing characteristics in the different reaches of the Yangtze Estuary were analyzed from the index of water depth,width,direction and stability.The results show that it has not yet been in effective manual control in the most reaches of the Yangtze Estuary,channel stability in local reaches is poor and the depth of partial waterways is shallow,which restrict the development and utilization of waterway resources.For the rational exploitation and effective protection of the Yangtze Estuary waterway resources,it is need to further clarify the basic principle and ideas of navigation channel regulation and propose the scientific and rational project layout scheme according to the recent changes of river regime and the navigation-obstructing characteristics.